The placebo effect is really good at curing people as well.
Challenging the assertion is not a specific attack on you nor your doctor. Rather, when things which are not medically accurate are allowed to stand unchallenged, people start to believe them because they read it on the internet. If it were the vibration, we would not observe a similar rate of heart attacks from shoveling snow or other strenuous activities which do not involve vibration, and we WOULD observe a high rate of heart attacks after riding over poorly maintained roads, in poorly maintained cars, riding on the train, mowing the lawn with a riding mower, or in other non-strenuous activities which involve vibration.